Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c671698edb457c…

MALICIOUS

PDF

67.6 KB Created: 2021-03-06 13:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d327b3209d76f3821ad371adf5d979ae SHA-1: 92c5917e7a854f92699b6d8a0a26a3ebcd1e2409 SHA-256: 13c671698edb457c37b1d30b74eaa027f2f9efad9262e4c024d2bac3af130fa1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://kuzutuzo.ru/123?utm_term=movado+series+800+chronograph+black+pvd+stainless+steel+men%2527s+watch PDF link annotation
    • https://cdn.sqhk.co/gudopokobipa/heh5UUt/smooth_action_cam_alternative.pdfIn PDF document text
    • http://pukujadud.getenjoyment.net/budemadaxana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408188/normal_601be45c54403.pdfIn PDF document text
    • https://cdn.sqhk.co/mizogujuzo/g0jcKhj/60630957130.pdfIn PDF document text
    • https://cdn.sqhk.co/linewebozid/iaNBihM/4576755923.pdfIn PDF document text
    • https://cdn.sqhk.co/tofigidukug/adt91vg/cold_patch_asphalt_repair_canadian_tire.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/xigetixutilisi.pdfIn PDF document text
    • http://gepanukotex.getenjoyment.net/traducir_de_espaol_a_ingles_sin_perder_formato.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420431/normal_600528702520d.pdfIn PDF document text
    • http://yoganchik.space/tinder_plus_gratis_2020_apki8mey.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/AdCgcgi/popoza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486037/normal_60342c8112f4f.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/jeasuLG/73566115132.pdfIn PDF document text
    • http://pasiworuwiwoz.getenjoyment.net/beraginaxudugaxalawaxasi.pdfIn PDF document text
    • http://tersq.fun/56757322941ptgxx.pdfIn PDF document text
    • https://cdn.sqhk.co/podogule/gjhggiP/jaguzuxixagalozirixo.pdfIn PDF document text
    • http://canlisohbetim.net/lamuwijigivu775bj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/telurisaxovowufezemokumu.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/how_to_use_mixer_kitchenaid.pdfIn PDF document text
    • http://roxujewov.myartsonline.com/45377110311.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC881 6216 bytes
SHA-256: 9b95a1e30ab3876792be49e22c55468e448ce1b26f24400374e24a9ddeb7c06d
font_01_sfnt_off0000dda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA4 10412 bytes
SHA-256: e68f7d47d7ebbdf5c7e2e7b639fc29a2936e7b37c43b95d3c6437a73ef739ae7

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